Find x for brainiest 3

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

You buy a veido game for $60 and the sales tax is 8% what is the total cost for the game including the sales tax